Current-inducing device for record-controlled machines



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J; w, BRYCE,

CURRENT INDUCING DEVICE FOR RECORD CONTROLLED MACHINES Jan. 31, 1928.,

'. Filed March 28, 1924 warren stares earner o ar es;

JAMES W. BRYCE, 0F BLOOMRIELD, NEW JERSEY, ASSIGNOR; TO. THE TABULA'IING MACHINE COMPANY, OF ENDICOTE, NEW YORK, A CORPORATION OF NEW JERSEY.

cunnEnr-mnucrtm :onvrcn' non nnoonn-con'rnorrnn MACHINES.

. "h ucaaon flied time 28,1924. s eria No. 702,639.

forations to the magnet devices may be simplified by the omission of elements heretofore considered essentiaL.

In the present invention provision is'made f for the omission of contacts and controlling resistances from the card and magnet cir-' cuits of such machines in order to lower the cost of construction and to obviate the necessity of adjustment or replacement of such parts when the machines are in use.

Further objects of the present invention reside in the provision of electrical devices for perforated record controlled machines which will permit the machines to operate atas high orhigher operating speeds than heretofore without the attendant complica tio'n heretofore necessary to secure the desired fast circuit conditions. c-

In accordance with the resent invention 1 provide means for supp ying the card or brush and magnet circuits with direct current impulses which are timed to occur at the time the record perforations pass under the brushes. In the event that there is a per j foration under'a given brush the direct cur- I tabulatingmotor TM. I This gearing also [drives the tabulator counter in the usual manner. A shaft 21 isdrivenin unison with the card feeding devices and makes one revolution per card cycle. This shaft carries co ,certain-contact devices and contact cams as will be hereinafter described.

I The card feeding section of themachine is" provided with the usual card lever 22 which 24 when cards. are'passing under the brushes.- To start the tabulator into operation the operator first closes main line switch 26' to the supply main. Thereafter start key 27 is depressed, which, upon-the closure of the contacts', vestablishes acircuit from the line 28,

tabulating motor TlVLstop key 30, motor re lay magnet 29 and back through .Wire 31 to' source. The energization of the motor relay lating motor-thro h the armature of motor relay magnet 29, line 32, throughcam contacts 33 which are closed after the motor has rotated'the parts and thence back through return circuit from 32 to 31 maintaining the motor relay 29 energized at 'all times when cardsare passing, through the machine.

31 to source. 1 Cards now pass downwardly c'loses'contacts 23 and supplementary contacts 65 29 establishes a holding circuit for theta'bu- 7.5

Upon the passage voi? the last card control relay 34 becomes deenergiz'ed" hereby opening contacts 35-and causing the motor-relay 00 29 to become deenergizcd upon the opening:

'ofcontacts 33.

Allof the above features are common and well known in present day tabulating marent impulse will pass through the card and magnet circuit to the corresponding, magnet and energize the latter. If a perforation is absent, the: direct current-impulse will be interrupted by the card it 11* the magnet will not be energizedjv Provision is made for supplying the current at high potential so that the circuit operation will be extremely rapid. Y F i In the drawings, r

Fig. 1 shows'a diagrammatic view of a per iterated record controlled machine" embodying the invention.

Fig. 2 is a detail; view showing the timing contactor'which is usedin this machine. I 1 In Fig. 1 ofthe'drawings, 10' designatesa stack of record cards which are fed by the usual upper and lower feed rolls 11, 12, past cooperating brushes 13'and contact blocks 14. The gearing for rotating the feed rolls is shown conventionally at 18. This gearin receives its drive from a shaft 20 which by a belt and pulley connection is driven by the For the purposes of the present. application I have illustrated the card circuit which is controlled by the perforated record cards in cooperation with brushes 13 and contact blocks Ma ian controlling the magnets of an ice adding gcounter. However, the controlling magnets may be used for'other purposes than adding.- For example, they may be sorting or printing magnets or'may be used for any desiredpurpose, The brushes 13 and com 105 tactblocks 14: constitute card controlled contacts for the magnet-circuits and these parts {will hereafter be termed perforation reading devices.

chines and require no further description.

The counter illustrated in Fig. 1 is of 00'. like -Patent No. 1,307,740.

ventiona'hform such as is shown in Lake Actuation of the counter is controlled by the energization of magnets 40;; In each countrr there is' provided acommon bar 41 suitaoly connected to lines 42. Individual wires '43 connect the magnets 40 to the common bars 41 and also extend to plug socket-s 44 on the usual tabulator 'plugbo'ard. "On this plugboard are other. sockets 45 which, through cables 46, connect to the contact blocks 14. It will be understood that plug sockets 44 and 45 are connected by the usual plug connections. In the diagrammaticshowing of the counter it is particularly noted that leads 43 contain neither'res'istances nor the.usual relayless counter contacts heretofore used in connection with the counter circuits of the Lake patent heretofore mentioned. Such resistances and controlling contacts are entirely unnecessary in the present construction.

The means for supplying the magnets with current for energizing same will now be described. Connected to line 28 is a wire 46 which connects .to a controlling resistance 47, from the other end of which a suitable con; nection extends to line 31. Suitable adjustable taps 48, 49, are provided cooperating with the resistance 47 p and by adjusting these taps in the manner of a potentiometer dif ferent current voltages may be secured on.

the'circuit to whichthe tapsare connected. This circuit extends from tap 49 through the card lever contacts 24, thence through an 'adjustablej'tap 5O cooperating with a ballast f resistance This resistance 51, if desired, may be of thefliron wire type having a positive tempe ature' coeiiicient. From'resistance 51 a suite. 1e" le'a'd co'nnects to the primary coil"52 of a stepm mutual inductance device or transformer. The'transformer comprises theius'ual core 53 and is provided with a sec ondary winding 54 in inductive-relation to the primary 52. From primary winding 52 a wire 55 leads to fixed contact 56 of a timing device, "interruptor or contactor'. This tuning dev ce, nterruptor or contactor may be of any'desired form. As here shown it ."includes fixed contactfidand movable contact 57,.thelatter being actuated toopen the contacts by. means of c em se and resilient-l 1y closed. Connected across the movable and fixed contacts" is suitable condenser 59. The cam 58isfmounted upon the shaft 21 which, as previously described, is arranged toymake one comp 'ete, re volut1on per card cycleif 'lhis"cam is provided with a number "of low positions' or dwells 60 (Fig.2), which in number correspond with the number-of index pointperfor'ations in each record card column; The arrangement and timing of the contactor and the relation of the'transs former windings is such that just before any singie perforation or plurality of perforations. disposed in the row across the record card colne under the brushes, the primary circuit is closed. Immediatelythereafter and before the brush or brushes have left the brushes current flow will occur in the brushes and magnet circuits. This current will be of sufiicient intensity and voltage to rapidly energize the magnets 40 of all columns in which a perforation is under the brushes.

In other columns the record card material will act as an insulator and interrupt the impulses in its particular magnet circuit.

The pulsating direct current impulses in the secondary circuit are exactly timed with the passage of index point perforations under the brushes. For a card having twelve index point perforation positions, for example, there will be twelve impulses in the secondary coil 54 foneach card cycle and the magnets 40will receive only such impulses shown in the as are permitted by'the perforations in the record card. By. properly proportioning the windings of the transformer and properly arranging thecontactor and condenser 59 and adjusting taps 48, 49 and 50, it is pos-" sible. to secure extremely rapid impulses in .the magnet circuits so that/these magnets will energize rapidly, attract their armatures and control the counter operation.

In practice it is found that a single con actor is e'fl'ective to. control a considerable number of magnet circuits. If desired, however, multiple contactors and multiple transformers may be utilized.

, The supplementary card lever contacts 24. serve to interrupt the primary circuit when there are no cards in the machine and thus prevent the current flow across the brushes,

.when cards are absent. Inasmuch as the cardand magnet circuits are normally deenergized it is not necessary to provide-the usual controlling contacts heretofore employed to break the brush circuits in the interval between the cards. These contacts heretofore necessary i What]: claim is-l -1. A'card-controlled machine comprising in combination, a card controlled circuit, a

may be entirelyomitted;

circuit inductively coupled tosaid first men tioned circuit for energizing'the same, a

source of direct current for energizing said second mentioned circuit, and means for periodically varying the current in said secnd mentioned circuit in predetermined timed felationship with respect to the card control. v

2. The combination set forth in claim 1- in which the first mentioned circuit. is ener= 1 gized from thesecond mentioned circuit by i said magnets and means for supplying a 4. In a perforated record-controlled ma a,step-up mutual induction. I

3. In a perforated record-controlled machine in combination with controlling magnets, perforation reading devices and circuits controlled thereby and including the series of direct current impulses to said circuits, said impulses being timed to accord with the reading oftheperforations by the reading devices, the said last mentioned means including a supply source of direct current, a transformer, and a contactor operatedto make and break circuits to the said transformer in timed relation to the reading of the perforations by the reading devices whereby the transformer sets up direct current impulses in such of the afore said magnet'circuits as arestablished by the corresponding reading devices.-

chine, in combination with controlling magnets,'means including brushes for connecting the said magnets in circuit by and through perforations in said records and means for supplying direct current impulses to said clrcuits each time theperforations in .a.rec-

in accordance with the presence of perforations under the reading devices, said means including a secondary coil connected to the circuits and reading devices and a primary,

coil inductively coupled to said secondary coil, and a source of direct current for energizing said primary coil.

G, In a perforated record-controlled machine, in combination with controlling magnets, perforation reading devices and circfiits controlled ,the'reby and including'the said magnets, and means for supplying direct current impulses to said circuits and reading devices, said impulses being timed in-accordance'with the presence of perforations under the reading devices, said means including a secondary coil connected .to the circuits and reading devices, and a primarv coil inductively coupled to said secondary coil, a source of direct current for energizing said primary and a circuit interruptor for interrupting the flow of current through the primary'coil at the times when the mag net circuits are established through therec 0rd perforations. i

7. In a perforated record-conti-olled i I chine having controlling magnets, circuits therefor and perforation reading means, in combination w th means for inducing direct current impulses in said circuits at thetimes when they are established by the perfora-' tion reading devices,,said last mentioned means including a timed cont'actor and interruptor in circuit with a direct current supply source, and, a transformer having coils in circuit with the contactor and other coils connected to supply induced current to the perforation reading devices and the magnet circuits.

8. The .invention set forth in claim 7 in which card lever contacts are provided in the interruptor circuit to close said circuit only when cards are passing through the machine.

9. The invention set forth in claim 7 in.

which a potentiometer connection in association with the direct current source of supply is provided for supplying current to the primary coil of the transformer and to the interruptor at the desired voltage.

10. The invention set forth in claim 7 in which a regulating resistance is provided in circuit with. the coil of the transformerwhich is .in' circuit with the interruptor.

11. The invention set forth in claim 7 in which a resistance is provided in circuit with the primary transformer coil and in which means is provided for adjusting the amount of said" resistance.

Intestimony whereof I hereto affix signature.

JAMES BRYCE. 

